Patrick Joseph McGrath (Sr.) is the son of Thomas Joseph McGrath (Sr.) and Joan Mary Lynch. He was born in 1964 in Illinois.

In 1989, he married Stacey Simmons in Illinois. She was born in 1964.

Children of Patrick Joseph McGrath (Sr.) and Stacey Simmons:

1. Margaret Ellen McGrath was born in 1992.
2. John Patrick McGrath was born in 1994.
3. Patrick Joseph McGrath (Jr.) was born in 1997.